FL7733 - Fairchild Semiconductor

FL7733 Primary-Side-Regulated LED Driver

This highly integrated PWM controller with advanced Primary-Side Regulation (PSR) technique provides features to enhance the performance of low-to-midpower LED lighting converter. The FL7733 LED driver is designed with minimum system components while LED current is accurately controlled by Fairchild’s TRUECURRENT® technique and improved feedback loop control.

Features

High Performance
 Cost-Effective Solution without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry
 Power Factor Correction
 THD <10% Over Universal Line Range
 Constant Current Tolerance: < ±1% Over Universal Line Voltage Variation < ±1% by 50% - 100% Load Voltage Variation < ±1% by ±20% Magnetizing Inductance Variation
 High-Voltage Startup with VDD Regulation
 Adaptive Feedback Loop Control for Startup without Overshoot High Reliability
 LED Short / Open Protection
 Output Diode Short Protection
 Sensing Resistor Short / Open Protection
 VDD Over-Voltage Protection .